Hello, James.
Personally, I was a part of the so-called "truth" for about 25 years. I would advise that you cease and desist your studying with them. It is the opinion of myself, and possibly many others who post on this Forum, that your newfound religion d-i-v-i-d-e-s familes instead of unifying families (a hope that you are holding on to).
With that said, should you make that committment to become a JW, then you shouldn't worry about what your parents (or anyone else) thinks about your choice. If this is the "truth" that you insist it is, then, nothing else matters.
"For every thinking human being, there is freedom of choice. For everyone else, there's Jehovah's Witnesses."